Aviation giant Airbus is threatening to leave Britain if the country withdraws from the European Union without an agreement on future trading relations, a warning that caused alarm Friday among business leaders. The company, which employs about 14,000 people at 25 sites in the UK, said in its strongest warning yet that it will "reconsider its long-term footprint in the country" if there is no deal. Airbus also says the currently proposed transition deal that runs through December 2020 is too short for the company to reorganize its supply chain. "In any scenario, Brexit has severe negative consequences for the UK aerospace industry and Airbus in particular. Therefore, immediate mitigation measures would need to be accelerated," said Tom Williams, CEO of Airbus Commercial Aircraft. "While Airbus understands that the political process must go on, as a responsible business we require immediate details on the pragmatic steps that should be taken to operate competitively." Williams said that the company had sought for 12 months to highlight the companys concerns, without success. "This is a dawning reality for Airbus," he said. "Put simply, a no-deal scenario directly threatens Airbus future in the UK" Anxiety was evident on Friday. Tariffs, which are non-existent for goods that move from one EU nation to another, could be applied each time those components cross and re-cross international borders. Modern manufacturing techniques result in plants with several locations, often in different countries, that specialize in specific parts. For instance, Airbus Filton production site is responsible for wing assembly. Darren Jones, the lawmaker representing the community where Airbus makes wings, attacked the government for listening to those who want the most hard line form of Brexit and "not to the businesses that employ thousands of British workers, including Airbus". "Thousands of skilled, well-paid jobs are now on the line because of the shambolic mess the government have created over the Brexit negotiations," he said. Prime Minister Theresa Mays government reacted quickly, but suggested there was no cause for worry. Her Downing Street office said that it was confident of getting a good deal and that "we do not expect a no-deal scenario to arise." May won a crucial Brexit vote in parliament on Wednesday, keeping her divided governments plans to end more than 40 years of British partnership with the European Union on track.